Occurrence of arrhenotoky and thelytoky in a parasitic wasp Venturia canescens (Hymenoptera: Ichneumonidae): Effect of endosymbionts or existence of two distinct reproductive modes?

European Journal of Entomology

HENRI Hélène¹  Emmanuel DESOUHANT¹  Patricia GIBERT¹  Vincent FORAY¹  Sonia MARTINEZ¹ 

[1] Université Lyon 1, Laboratoire de Biométrie et Biologie Evolutive, F-69000 Lyon & CNRS, UMR5558, F-69622 Villeurbanne, France;

关键词: hymenoptera;    ichneumonidae;    venturia canescens;    reproductive parasite;    thelytokous parthenogenesis;    sex evolution;   

DOI  :  10.14411/eje.2013.014

来源: DOAJ

【 摘 要 】

Endosymbiotic organisms are known to manipulate the reproductive biology of their hosts. Incomplete prevalence of endosymbiont inducing thelytokous parthenogenesis results in the coexistence of sexual and asexual individuals, and could account for the maintenance of sexual reproduction in certain populations or species. In the parasitoid Venturia canescens, arrhenotokous ("sexual") and thelytokous ("asexual") individuals occur sympatrically. We aimed to determine whether endosymbionts are implicated in the thelytoky of V. canescens. After screening females of the two reproductive modes for several reproductive parasites: bacteria (Wolbachia, Rickettsia, Bacteroidetes, Spiroplasma, Arsenophonus) and Microsporidia, we concluded that thelytoky in V. canescens is not induced by any of these parasites and confirmed its suitability as a biological model for solving the evolutionary enigma of the maintenance of sexual reproduction.

【 授权许可】

Unknown